Total number of molecules/species from following which will be paramagnetic is
\(\mathrm{O}_2, \mathrm{O}_2^{+}, \mathrm{O}_2^{-}, \mathrm{NO}, \mathrm{NO}_2, \mathrm{CO}, \mathrm{K}_2[\mathrm{NiCl}_4],[\mathrm{Co}(\mathrm{NH}_3)_6] \mathrm{Cl}_3,\)\(\mathrm{~K}_2[\mathrm{Ni}(\mathrm{CN})_4]\)

The test to distinguish primary, secondary and tertiary amines is

Identify the correct statement for the below given transformation.

Fluorination of an aromatic ring is easily accomplished by treating a diazonium salt with \(HBF_4\). Which of the following conditions is correct about this reaction?

The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is \(2 \mathrm{~K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+8 \mathrm{H}_{2} \mathrm{SO}_{4}+3 \mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O} \rightarrow 2 \mathrm{Cr}_{2}\left(\mathrm{SO}_{4}\right)_{3}+\) \(3 \mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}_{2}+2 \mathrm{~K}_{2} \mathrm{SO}_{4}+11 \mathrm{H}_{2} \mathrm{O}\) If the rate of appearance of \(\mathrm{Cr}_{2}\left(\mathrm{SO}_{4}\right)_{3}\) is \(2.67 \,\mathrm{~mol}\) \(\min ^{-1}\) at a particular time, the rate of disappearance of \(\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}\) at the same time is ...... \(\mathrm{mol}\, \mathrm{min}^{-1}\) (Nearest integer)

Consider the following reactions is correct

Which of the following statements is not true about \(RNA\) ?

The distillation technique most suited for separating glycerol from spent-lye in the soap industry is:

 If the shortest distance between the lines \(\frac{{x - 1}}{\alpha } = \frac{{y + 1}}{{ - 1}} = \frac{z}{1},(\alpha  \ne \, - 1)\) and \(x+y+z +1=0= 2x - y + z + 3\) is \(\frac {1}{\sqrt 3},\) then a value \(\alpha \) is

The pH and conductance of a weak acid (HX) was found to be 5 and \( 4 \times 10^{-5} \) S, respectively. The conductance was measured under standard condition using a cell where the electrode plates having a surface area of \( 1 \, cm^{2} \) were at a distance of 15 cm apart. The value of the limiting molar conductivity is ......... \( S \, m^{2} \, mol^{-1} \). (nearest integer) (Given: degree of dissociation of the weak acid (a) \(\ll 1\) )

Choose the correct statements from the following. \(A\). All group \(16\) elements form oxides of general formula \(\mathrm{EO}_2\) and \(\mathrm{EO}_3\) where \(\mathrm{E}=\mathrm{S}, \mathrm{Se}, \mathrm{Te}\) and Po. Both the types of oxides are acidic in nature. \(B\). \(\mathrm{TeO}_2\) is an oxidising agent while \(\mathrm{SO}_2\) is reducing in nature. \(C\). The reducing property decreases from \(\mathrm{H}_2 \mathrm{~S}\) to \(\mathrm{H}_2 \mathrm{Te}\) down the group. \(D\). The ozone molecule contains five lone pairs of electrons. Choose the correct answer from the options given below:

A sportsman runs around a circular track of radius \(r\) such that he traverses the path \(A B A B\). The distance travelled and displacement, respectively, are

Two very long, straight and insulated wires are kept at \(90^o\) angle from each other In \(xy -\) plane as shown in the figure. These wires carry current of equal magnitude \(I\), whose directions are shown in the figure. The net magnetic field at point \(P\) will be